JP2000293708A - Picture display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realistically display the background of a three-dimensional picture. SOLUTION: Two-dimensional background picture data stored in a character ROM are read out and a background picture is plotted in the frame memory of a video RAM (U1 and U2). Model data in the character ROM are read out and an object is arranged on a world coordinate system, and then, the object is projected upon a screen coordinate system (U3-U6). Texture data in the character ROM are read out and a visual field picture to which a texture is stuck is generated at the position in the frame memory corresponding to each polygon of the projected object (U8). The visual field picture in which the object is plotted on the background picture is displayed on a displaying means (liquid crystal monitor) be occurrence of interruption (U9 and U10). Consequently, the pattern of the background picture is displayed without being smashed by reduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device mounted on a game machine such as a pachinko machine, a slot machine, a coin game machine or a video game machine, and more particularly to a visual field for displaying an object in a virtual three-dimensional space. The present invention relates to a technique for displaying a background image in an image.

[0002]

2. Description of the Related Art Conventionally, when an identification symbol identified by a player in a gaming machine is a three-dimensional image, an object formed by a plurality of polygons corresponding to the identification symbol is arranged in a virtual three-dimensional space. Then, the appearance in the virtual three-dimensional space is converted into a visual field image based on a given viewpoint, and the visual field image is displayed on the screen of the image display device. Also, when displaying the background behind the identification symbol, an object for pasting the background image is set on the back of the object arranged in the virtual three-dimensional space. The background is displayed.

More specifically, for example, a background image HT which is a texture in which a number of rings are drawn as shown in FIG.
Will be described as a background. As shown in FIG. 13, first, objects B1 and B2 corresponding to identification symbols in a visual field image are set in a world coordinate system which is a virtual three-dimensional space. Next, a background object for pasting the background image HT further to the back side of the object B1 set to the back side than the object B2 set to a position away from the given viewpoint SP in the world coordinate system Set OH. Each of the objects B1, B2, and OH included in the projection range SC is perspectively projected on a screen coordinate system that is a two-dimensional projection plane based on the viewpoint SP. Further, a texture is attached to each polygon of each of the objects B1, B2, and OH projected on the screen coordinate system to generate a visual field image. At this time, an image of a part of the background image HT corresponding to the projection range SC on the background object OH is pasted on the background object OH.
As a result, as shown in FIG. 14, a visual field image in which identification symbols S1 and S2, which are images corresponding to the objects B1 and B2, are drawn on a partial image of the background image HT is displayed on the monitor.

[0004]

However, the above-described conventional image display device for a game machine has the following problems. The background in the visual field image is the identification symbol S1,
Since the object B needs to be displayed on the back side of S2, the object B in which the background object OH is arranged in the virtual three-dimensional space
1 and B2 need to be set on the back side. That is, when viewed from a given viewpoint in the virtual three-dimensional space, each object B
Since the background object is set at a position further away from the objects B1 and B2, the background object OH projected on the screen coordinate system is projected smaller than the objects B1 and B2. That is, the image of the background image HT of the portion to be pasted on the small projected background object OH is also reduced according to its size. As a result, as shown in FIG. 14, the background in the visual field image displayed on the screen has a problem that the pattern is displayed smaller than the pattern of the background image HT shown in FIG. Due to this problem, for example, when the background image is an image including a fine pattern such as a photograph, when actually displayed on the screen,
There is a problem that the fine pattern of the photograph is crushed and difficult to see, and it is difficult to realize a realistic display inherent in the photograph.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an image display device capable of displaying a background in a three-dimensional image realistically.

[0006]

The present invention has the following configuration in order to achieve the above object. 1. According to a configuration of the present invention, a storage unit that stores at least an object formed by a plurality of polygons and a texture in which a pattern to be attached to each polygon of the object is drawn; Object setting means for setting in a three-dimensional space; gaze rotation means for rotating a gaze direction based on a given viewpoint in the virtual three-dimensional space around the viewpoint; and 2 based on the rotated gaze direction. Projecting means for setting a three-dimensional projection plane and projecting the object on the projection plane;
A field-of-view image generation unit that generates a field-of-view image in which a texture stored in the storage unit is attached to each polygon of an object projected on the projection plane in an image generation area corresponding to the projection plane; A display output unit that outputs a visual field image in the display unit to a display unit and displays a state in the virtual three-dimensional space accompanying the rotation of the line-of-sight direction, wherein the storage unit further includes:
A background image setting that stores a background image displayed on the back side of the object in the view image, and sets the background image stored in the storage unit in the image generation area before generating the view image. It is characterized by having means.

[0007] 2. The image display device according to the above configuration 1, further comprising a display area setting unit that sets a partial area on the background image stored in the storage unit as a display region, wherein the background image setting unit Is for setting a background image included in the display area in the image generation area before generating the visual field image. According to this configuration, the display area setting unit sets a partial area on the background image stored in the storage unit as a display area. The background image setting means sets a background image in a display area, which is a part of the background image, in the image generation area before the visual field image is generated in the image generation area by the visual field image generation means. The field-of-view image generation means generates a field-of-view image in which texture is attached to each polygon of the projected object over an image generation area in which a background image is set. The display output means outputs the visual field image in the image generation area to the display means. The display means is a virtual 3 accompanying the rotation in the line of sight.
The background image is displayed together with the state in the dimensional space. As a result, the background pattern can be displayed more realistically than when the background is displayed by an object arranged in the virtual three-dimensional space. Further, since an object for displaying the background is not set in the virtual three-dimensional space, the processing in the image display device can be speeded up.

[0008] 3. 3. The image display device according to Configuration 2, wherein the device further moves a display area on a background image stored in the storage unit based on a rotation angle of a line of sight in the virtual three-dimensional space. A moving amount calculating unit that calculates a moving amount, wherein the background image setting unit includes: a background included in a display region moved based on the moving amount in the image generation region before generating the visual field image. This is for setting an image. According to this configuration, the movement amount calculation unit calculates the movement amount for moving the display area on the background image based on the rotation angle in the line of sight rotated by the line of sight rotation unit. The background image setting means moves the display area according to the movement amount, and sets a background image included in the moved display area in the image generation area before the visual field image is generated by the visual field image generating means. I do. The field-of-view image generation means generates a field-of-view image in which texture is attached to each polygon of the projected object over an image generation area in which a background image is set. The display output means outputs the visual field image in the image generation area to the display means. The display means displays a background image that moves with the rotation in the viewing direction together with the state in the virtual three-dimensional space accompanying the rotation in the viewing direction. As a result, the background can be moved in the same manner as the object moving in the line-of-sight image with the rotation of the line-of-sight direction, so that a natural display can be realized. Further, since an object for displaying the background is not set in the virtual three-dimensional space, the processing in the image display device can be speeded up.

4. In the image display device according to the third aspect, the movement amount calculation unit may include a second axis perpendicular to the line of sight and the first axis, based on a rotation angle of the first axis perpendicular to the line of sight. Calculating the amount of movement for moving the display area in the direction of and calculating the amount of movement for moving the display area in the direction of the first axis based on the rotation angles of the two axes. is there. According to this configuration, when the line-of-sight direction rotates around the second axis, the view based on the line-of-sight direction in the virtual three-dimensional space moves in the first axis direction. While calculating the amount of movement for moving the display area on the background image in the axial direction, if the line of sight rotates around the first axis, the field of view based on the line of sight in the virtual three-dimensional space becomes the second field. Since it moves in the axial direction, a movement amount for moving the display area on the background image in the second axis direction is calculated. As a result, the background in the line-of-sight image can be more accurately moved in accordance with the rotation in the line-of-sight direction in the virtual three-dimensional space, so that a more natural display can be realized.

[0010] 5. In the image display device according to any one of the first to fourth aspects, the background image stored in the storage means is an image configured such that the patterns at both left and right ends are continuously cylindrical. According to this configuration,
Since the left and right ends of the background image stored in the storage means are continuous in a cylindrical shape, the width of the background image corresponds to one rotation in the viewing direction. As a result, it is possible to display a seamless background in the horizontal rotation in the line-of-sight image.

6. In the image display device according to any one of the above-described Configurations 1 to 4, the background image stored in the storage unit may have a continuous pattern at both upper and lower ends and a continuous spherical shape at both left and right ends. The image is configured as follows. According to this configuration, since the background image stored in the storage means has a continuous pattern at both the upper and lower ends and the left and right ends so as to be spherical, the vertical width and the horizontal width of the background image are the same as those in the viewing direction. It corresponds to the rotation. As a result, it is possible to display a seamless background in the line-of-sight image in the vertical and horizontal rotations.

7. A game machine including the image display device according to any one of the above-described configurations 1 to 6. According to this gaming machine, the image display device according to any one of the above-described configurations 1 to 6, displays the state in the virtual three-dimensional space accompanying the rotation in the line-of-sight direction together with the background. As a result, the player can see a realistic display mode, so that the interest of the player can be made permanent.

8. In the above configuration 7, the gaming machine is a pachinko machine. Above all, as a basic configuration of a pachinko machine, an operation handle is provided, and in response to the operation of the handle, a game ball is fired at a predetermined game area, and the game ball is provided at an operating port arranged at a predetermined position in the game area. The change of the symbol image on the display device for a game machine is started as a necessary condition for winning. During the occurrence of the specific game state, the winning opening arranged at a predetermined position in the game area is opened in a predetermined mode to enable the game balls to be won, and the value corresponding to the number of the winnings (for example, if only premium balls are used). Not including writing on a magnetic card). As a result, the fun of the player can be made permanent.

9. Setting an object formed by a plurality of polygons in a virtual three-dimensional space;
Rotating a gaze direction based on a given viewpoint in the three-dimensional space around the viewpoint, setting a two-dimensional projection plane based on the rotated gaze direction, and projecting the object on the projection plane And generating a view image in which texture is attached to each polygon of the object projected on the projection plane in an image generation area corresponding to the projection plane, and displaying the view image in the image generation area. Outputting to the means and displaying a state in the virtual three-dimensional space accompanying the rotation of the line-of-sight direction, the background image displayed on the back side of the object in the visual field image. Setting a partial area as a display area, and moving a display area on the background image based on a rotation angle of a line-of-sight direction in the virtual three-dimensional space. Calculating a moving amount, and setting a background image included in a display region moved based on the moving amount in the image generation region before generating the visual field image. It is a feature.
According to this method, an object formed by a plurality of polygons is set in a virtual three-dimensional space. A two-dimensional projection plane is set based on a line-of-sight direction that rotates about a given viewpoint in the virtual three-dimensional space. The object is projected on the two-dimensional projection plane. A partial area of the background image displayed on the back side of the object is set as a display area. The movement amount is calculated based on the rotation angle in the line-of-sight direction. The display area is moved based on the movement amount, and a background image in the display area after the movement is set in an image generation area corresponding to a projection plane. The object projected on the projection plane is written in the image generation area in which the background image is set, and a field-of-view image in which texture is attached to each polygon of the object is generated. The field-of-view image is displayed on the display means. As a result, the background can be moved in the same manner as the object moving in the line-of-sight image with the rotation of the line-of-sight direction, so that a natural display can be realized. Further, since no object for displaying the background is set in the virtual three-dimensional space, the image display processing can be sped up.

10. Setting an object formed by a plurality of polygons in a virtual three-dimensional space; rotating a line of sight based on a given viewpoint in the virtual three-dimensional space around the viewpoint; Setting a two-dimensional projection plane based on the line-of-sight direction, projecting the object on the projection plane, and displaying a field-of-view image in which texture is attached to each polygon of the object projected on the projection plane; Generating an image in the image generation area corresponding to the following, and outputting a visual field image in the image generation area to a display unit to display a state in the virtual three-dimensional space accompanying the rotation in the line-of-sight direction. In a storage medium storing a program to be executed by a computer, a background image displayed on the back side of the object in the visual field image Setting a partial area above as a display area, and calculating a movement amount for moving the display area on the background image based on a rotation angle of a line-of-sight direction in the virtual three-dimensional space; Setting a background image included in a display area moved based on the movement amount in the image generation area before generating the visual field image. is there. According to this configuration, the computer executes the method invention of the above configuration 8 by reading the program stored in the storage medium into the computer. As a result, the computer can execute the method invention described in the above configuration 8.

[0016]

The operation of the present invention is as follows. The storage means stores at least an object formed by a plurality of polygons, a texture to be attached to each polygon of the object, and a background image. The object setting means sets an object stored in the storage means in the virtual three-dimensional space. The gaze rotation unit rotates a gaze direction based on a given viewpoint in the virtual three-dimensional space. The projection unit sets a two-dimensional projection plane based on the rotated line-of-sight direction, and projects the object on the projection plane. The background image setting means sets the background image stored in the storage means in an image generation area corresponding to the projection plane. The visual field image generating means generates a visual field image in which a texture is attached to each polygon of the object projected on the projection plane on the background image set in the image generating area. The display output means outputs a visual field image including the background image to the display means. The display means displays the state in the virtual three-dimensional space accompanying the rotation in the line-of-sight direction together with the background.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. A pachinko machine will be described as an example of a gaming machine provided with an image display device for displaying a three-dimensional image. Note that the gaming machine according to the present invention is not limited to a pachinko machine, and can be applied to, for example, a slot machine, a coin gaming machine, a video game machine, and the like.

FIG. 1 is a front view showing a schematic configuration of a pachinko machine according to the present embodiment, and FIG. 2 is a block diagram showing a schematic configuration of a control board and an image display device provided in the pachinko machine.

The pachinko machine of this embodiment has a game board 7 having a control board 1 (see FIG. 2) for controlling the entire pachinko machine.
A frame 3 on which the game board 7 is mounted, an upper tray 4 provided below the game board 7, and a firing device (not shown) for firing the pachinko balls stored in the upper tray 4 onto the game board 7. Is connected to a rotary handle 5, a lower tray 6 provided below the upper tray 4, and a screen 4a of the liquid crystal monitor 4 for displaying an identification symbol for identifying a game state by a player. And an image display device 2 mounted so as to be disposed substantially at the center of the image display device. The screen 4a displays displacements (movement, rotation,...) Of a plurality of identification symbols that are three-dimensional images.
Deformation, etc.) and the displacement of symbols other than the identification symbol are displayed according to the gaming state of the gaming machine. The identification symbol is an image for causing the player to recognize the gaming state of the gaming machine. For example, if three displaced identification symbols stop in the same type, the player recognizes that a specific game state has occurred. On the other hand, if the three identification symbols stop in different types, the normal game state. Is maintained by the player. As will be apparent from the following description, the identification symbol is an image in which a three-dimensional object arranged in the virtual three-dimensional space is displayed two-dimensionally, and the object is displayed on the image display device 2 in the virtual three-dimensional space. By displacing, the identification symbol is displaced and displayed on the screen 4a. Further, the specific game state is a state that is advantageous to a player who can obtain a large number of pachinko balls, and the normal game state is a state that is disadvantageous to a player who consumes pachinko balls.

The game board 7 has a rail 7a for guiding the pachinko ball fired by the rotary handle 5 to the board surface,
A plurality of nails (not shown) for guiding pachinko balls to unspecified locations, a plurality of winning holes 7b for winning pachinko balls guided by the nails, and a pachinko ball guided substantially near the center of the game board 7 Is provided, and a large winning opening 7d is provided in which a relatively large number of pachinko balls can be simultaneously won in a specific game state. Each of the winning opening 7b, the starting opening 7c and the special winning opening 7d has a winning detecting sensor 11 for detecting the entry of a pachinko ball.
(See FIG. 2). When the winning detection sensor 11 detects the entry of a pachinko ball, a predetermined number of pachinko balls are supplied to the upper tray 4 by the control board 1 provided in the game board 7. A start start sensor 12 (see FIG. 2) is provided in the start port 7c. Further, an opening / closing solenoid 13 (see FIG. 2) is provided in the special winning opening 7d, and the operation of the opening / closing solenoid 13 allows the special winning opening 7d to be freely opened and closed. It should be noted that, in addition to the above, a holding lamp or the like for storing the number of pachinko balls entered into the starting port 7c is provided, but the description thereof is omitted in this embodiment.

The upper receiving tray 4 has a receiving tray shape.
The pachinko balls supplied from the ball supply port 4a to which the pachinko balls are supplied are stored. Further, on the opposite side of the upper tray 4 where the ball supply port 4a is arranged, a ball feed port (not shown) is provided which communicates with a launching device which launches a pachinko ball toward the rail 7a. Further, on the upper part of the upper receiving tray 4, a ball removing button 4b for transferring the stored pachinko balls to the lower receiving tray 6 is provided, and by pressing the ball removing button 4b, the pachinko balls stored in the upper receiving tray 4 are pressed. Can be transferred to the lower tray 6. The lower receiving tray 6 has a receiving tray shape and receives the pachinko balls transferred from the upper receiving tray 4. The lower tray 6 is provided with a ball removal lever (not shown) for removing the pachinko balls stored therein.

The rotary handle 5 is connected to a firing device for firing a pachinko ball toward the rail 7a. By rotating the rotary handle 5, the launching device launches a pachinko ball with a strength corresponding to the amount of rotation. In addition,
At this time, the pachinko balls are fired one by one at predetermined intervals.

The control board 1 provided on the game board 7 supplies a predetermined amount of pachinko balls based on the detection of the ball detecting sensor at the winning port 7b or the starting port 7c, or operates a lamp or speaker (not shown). To execute various events. The control board 1 is connected to the image display device 2 so that information can be distributed, and a command or the like for displaying an identification symbol indicating a game state is displayed on the screen 4a of the image display device 2. What to send.

The image display device 2 includes a liquid crystal monitor 4 having a screen 4a, and a CPU for displaying an identification symbol on the liquid crystal monitor 4.
22 and the like.

Hereinafter, a block diagram of the control board 1 shown in FIG. 2 and an outline of the processing performed by the control board 1 will be described with reference to a flowchart shown in FIG.

As shown in FIG. 2, the control board 1 includes a main control unit 16 which is a microcomputer including a memory and a CPU, a counter 14 for outputting a value for determining a game state in the gaming machine, Mouth 7c (see FIG. 1)
A start start sensor 12 for detecting the entry of a pachinko ball with
The winning detection sensor 11 for detecting the entry of a pachinko ball at the winning opening 7b or the like (see FIG. 1), the open / close solenoid 13 for opening and closing the large winning opening 7d (see FIG. 1), and the interface 21 of the image display device 2. It is provided with an interface 15 and the like which are connected so that information can be distributed.

Hereinafter, the processing performed in each block of the control board 1 will be described in detail with reference to the flowchart of FIG. Step S1 (Detection of Incoming Ball) The player hits the pachinko ball into the gaming board 7 with the rotary handle 5, and starts the pachinko game. Gaming board 7
A part of the pachinko ball hit into the inside is guided to near the center of the board and enters the starting port 7c. When the pachinko ball enters the start port 7c, the start start sensor 12 that detects the ball that has entered the start port 7c outputs a start start signal to the main control section 16c.
And the winning detection sensor 11 provided in the starting port 7c sends a winning signal to the main controller 16. In this embodiment, the start start sensor 12 and the winning detection sensor 1
1 is used together by the same sensor. Also, when a pachinko ball enters the winning opening 7b, each winning opening 7b
The winning detection sensor 11 sends a winning signal to the main control unit 16.

Step S2 (Pachinko ball supply) When the main control unit 16 detects a winning signal from the winning detection sensor 11, it activates a pachinko ball supply mechanism (not shown) to supply a predetermined number of pachinko balls to the ball supply port 4a. To the upper tray 4

Step S3 (big hit lottery) When the main control unit 16 detects the start start signal from the start start sensor 12, the main controller 16 reads the output value of the counter 14 at this time and performs a big hit lottery. In the jackpot lottery, if the output value of the counter 14 is a predetermined value, a "big hit", that is, a specific game state is generated. On the other hand, if the output value of the counter 14 is other than the predetermined value, “missing”, that is, the normal game state is continued.

Step S4 (Transmit Command) The main controller 16 transmits a command corresponding to a normal game state or a specific game state to the image display device 2 via the interface 15. The command is a command for causing the image display device 2 to execute a predetermined display program. For example, in the case of a jackpot, the main control unit 16 transmits a command for instructing the start of a predetermined reach, and after a predetermined time has elapsed, a command for instructing the type of the jackpot identification symbol to be stopped at the final stage of the reach. Send Thus, after displaying the reach of the type specified by the command, the image display device 2 further displays the reach of the type designated by the command so as to stop at the jackpot identification symbol. After the stoppage of the jackpot identification symbol is displayed on the image display device 2, the main control unit 16 gives an opening signal to the open / close solenoid 13 to open the big winning opening 7d, and the player can use a large number of pachinko balls. In a state where it can be obtained. Further, in this game state, the control base 1 sets, for example, about 10 balls that have won the special winning opening 7d as one round, and instructs the end of the round or the start of the next round each time the round ends. The command is transmitted to the image display device 2. Thereby, the image display device 2 displays a display mode of a different pattern for each round. On the other hand, in the case of a loss, a command is sent to the image display device 2 to indicate the normal change of the identification symbol or the type of the identification symbol of the loss to be stopped at the final stage of the reach display. As a result, after displaying the reach, the image display device 2 displays the reach so as to stop at the identification pattern of the loss.

Step S5 (New ball detection?) The main controller 16 waits until it detects the presence or absence of a new start signal from the start sensor 12 (new ball). It should be noted that the start lamp 12 detects the entry of the pachinko ball during the variation of the identification symbol (reach, normal variation, etc.), and the above-described holding lamp for storing the number of the entered pachinko balls is used. When it is lit, the lighting of the holding lamp is detected as a new start start signal. If there is a new start start signal, steps T2 to T4 are repeated. If there is no new start start signal, this process is terminated and the process stands by until a new start start signal is detected. In addition, the control base 1 that executes the above-described steps S1 to S5 is a so-called display mode instruction unit that instructs a display mode in the gaming state of the gaming machine.

Hereinafter, the image display device 2 will be described with reference to the block diagrams shown in FIGS. FIG.
Is a block diagram showing a schematic internal configuration of the VDP 27. As shown in FIG. 2, the image display device 2 includes a CPU 22
A first data bus 23 connected to the CPU 22;
Storing a program executed by the PU 22;
A program ROM 24 connected to the CPU 22 via the data bus 23, a work RAM 25 for storing various data obtained by the CPU 22 executing the program,
A DMA 26 for transferring data stored in the work RAM 25 to the VDP 27 in accordance with an instruction from the CPU 22;
26, a VDP 27 for generating a visual field image based on the data transferred through the first data bus 23,
A second data bus 28 connected to DP 27 and VDP 2
A character ROM 29 storing model data, texture data and background image data used in
The video RAM 30 temporarily stores the visual field image generated by the DP 27, and the liquid crystal monitor 4 that displays the visual field image in the video RAM 30. The character ROM 29 corresponds to a storage unit in the present invention. The model data stored in the character ROM 29 is an object in the present invention, the texture data is a texture in the present invention, and the background image data is a background image in the present invention. Equivalent to. The CPU 22 corresponds to an object setting unit, a line-of-sight rotation unit, a background image setting unit, a display area setting unit, and a movement amount calculation unit.
27 corresponds to a projection unit, a visual field image generation unit and a display output unit, and the liquid crystal monitor 4 corresponds to a display unit.

The CPU 22 is a central processing unit that manages and controls the entire image display device 2 by a control program stored in a program ROM 24.
Instruct P27 for displacement in object units,
It designates a background image or the like displayed on the back of the identification symbol, which is an object displayed on the screen 4a of the liquid crystal monitor 4. Specifically, the CPU 22 executes a display program for performing a display corresponding to the command according to the type of the command received by the interface 21, and stores the execution result of the display program in the work RAM 25.
At a predetermined interrupt interval (for example, 1/6
0), the execution result is transferred to the VDP 27 by DMA2.
6. The execution result within the predetermined interruption interval is a configuration in the world coordinate system in which the object specified in the object unit is arranged, a background image displayed on the back of the identification symbol, and the like, and the VDP 27 generates a view image for one screen. Data for For example,
The execution results include three-dimensional arrangement coordinate data for arranging the object in the world coordinate system, posture rotation data for rotating the object, model data for forming the object by a plurality of polygons, and Character ROM 29 storing texture data of a texture on which a pattern to be attached to a polygon is drawn
Of the character ROM 29 in which the storage address of the object, viewpoint coordinate data and line-of-sight rotation data for converting an object in the world coordinate system into a two-dimensional line-of-sight image, and a background image displayed at the back of the field-of-view image are stored. It contains data such as the storage address. The world coordinate system is a coordinate system corresponding to a virtual three-dimensional space for arranging a plurality of objects. The local coordinate system is an independent coordinate system unique to an object. The polygon is a polygon plane defined by a plurality of vertices of three-dimensional coordinates arranged in a so-called world coordinate system corresponding to a virtual three-dimensional space in the present invention. An object is a virtual object formed by a plurality of polygons. The model data is data for forming an object by a plurality of polygons in the local coordinate system, that is, a group of a plurality of three-dimensional coordinate data. The texture data is two-dimensional image data in which various patterns to be pasted on a polygon projected on a two-dimensional screen surface based on a visual line coordinate system are drawn. The line-of-sight coordinate system is a coordinate system based on a given viewpoint in the world coordinate system.

The program ROM 24 is provided with a plurality of types of control programs to be executed first by the CPU 22 when the game machine is powered on, and a plurality of types of displays for displaying commands according to the types of commands sent from the control board 1. A display program and the like are stored. The display program refers to, for example, a table prepared in advance, or performs arithmetic processing on the referenced data, thereby displaying various data for realizing a display mode according to the command, and displaying the data on the rearmost side of the visual field image. This is for deriving the storage address of the background image and the like. The display program includes not only a program that is executed independently but also a program that generates a task for performing display according to the type of command by combining a plurality of tasks, for example. Note that the program ROM 24 storing the display program corresponds to a storage medium in the present invention.

The work RAM 25 includes a first data bus 23
Various data such as storage addresses in the character ROM 26 in which the arrangement coordinate data, posture rotation data, model data, texture data, and background image data, which are execution results obtained by the CPU 22 connected via the CPU 22, are temporarily stored. Is to be stored.

The DMA 26 is a so-called direct memory access controller capable of transferring data in a memory without any processing by the CPU 22. That is,
The DMA 26 collectively transfers the data stored in the work RAM 25 to the VDP 27 based on a transfer start instruction from the CPU 22.

The VDP 27 is an image data processor having so-called geometry calculation processing and rendering processing functions. In particular, the VDP 27 transfers model data, which is a group of a plurality of three-dimensional coordinate data, to the CPU 22 and the first data bus 2.
3 and a function of performing a geometric calculation process and a rendering process on the coordinate data, respectively, and before attaching a texture to each polygon of the object, a background is stored in a frame memory provided in a video RAM 30 described later. It has a function to generate images.

As shown in FIG. 4, VDP 27
26, an interface 27a for receiving data transmitted through the first data bus 23. The interface 27a has a character ROM 29
The storage address of the model data stored in the ROM, the data for arranging the object in the world coordinate system, the data for converting the world coordinate system to the visual axis coordinate system, and the like are provided to the geometry calculation processing unit 27c, and the character ROM is provided.
The storage addresses of the texture data and the background image data stored in the memory 29 are given to the rendering processing unit 27d. Further, the interface 27a provides the palette processing unit 27b with color pallet data specifying the color information of the texture data included in the various data sent from the CPU 22 side.

The geometry operation processing section 27c reads model data for forming an object from a plurality of polygons from a given storage address, and performs posture rotation data and arrangement coordinate data for each polygon included in the model data. And the like to perform a geometry operation based on the above. That is, the geometry calculation processing unit 27c rotates each polygon of the object arranged in the local coordinate system, which is the reference posture, based on the posture rotation data. Further, the coordinate data of each polygon when the object formed by each polygon after the rotation is arranged in the world coordinate system based on the arrangement coordinate data is calculated. Further, two-dimensional coordinate data of each polygon when the object is projected on a two-dimensional projection plane based on a line of sight based on a given viewpoint in a world coordinate system based on camera data is calculated. Then, the geometry operation processing unit 2
7c gives the calculated two-dimensional coordinate data to the rendering processing unit 27d.

The pallet processing unit 27b includes a pallet RAM (not shown) for holding a color pallet, which is a plurality of types of color information previously written by the CPU 22 at the time of initialization, for example. The corresponding color palette is provided to the rendering processing unit 27d. In addition,
The color information is determined by a combination of red (R), green (G), and blue (B). Giving a color palette means giving the storage address of the color palette stored in, for example, the palette RAM to the rendering processing unit 27d, and the rendering processing unit 27d stores the storage address at the storage address when generating the visual field image. Refer to color information.

The rendering processing unit 27d first determines the character RO based on the storage address of the background image data.
The background image data stored at the storage address in M29 is read, and a background image based on the background image data is generated. Further, based on the storage address of the texture data, the texture data stored at the storage address in the character ROM 29 is read, and the texture data, the two-dimensional coordinate data of each polygon provided from the geometry operation processing unit 27c, the color palette, etc. , A field-of-view image is generated by overwriting a background image with an image obtained by pasting a texture on each polygon projected on the projection plane. At this time, the rendering processing unit 27d
Is a RAM that is alternately selected by the selector unit 27e
In the first frame memory 30a or the second frame memory 30b in the memory 29, an image to which a background image and a texture are pasted is written. The selector unit 27e reads out the visual field image from the frame side where writing is not performed, and sends the visual field image to the video output unit 27f. Video output unit 27
f outputs the visual field image to the liquid crystal monitor 4. In addition,
The geometry calculation processing unit 27c and the rendering processing unit 27d include a clipping process for determining a portion to be displayed on the screen, a hidden surface process for determining a visible portion and a non-visible portion depending on the context of polygons, and a condition of light from a light source. Processing such as shading calculation processing for calculating the state of reflection is also performed.

The character ROM 29 stores model data that forms an object in the local coordinate system by a plurality of polygons, texture data that is a pattern attached to each polygon included in the model data, and two-dimensional that is a background image in the visual field image. And stores the background image data of the VDP through the second data bus 28.
27. As shown in FIG. 11, the background image B is drawn so that the patterns at the left and right ends are continuous, and forms a cylindrical shape (shown by a two-dot chain line in FIG. 10) when the left and right ends are connected. It is an image that you do.

The video RAM 30 sequentially stores the visual field images generated by the rendering processor 27d of the VDP 27. As described above, the first frame memory 30a is a storage area for storing one screen of visual field images. And a second frame memory 30b. In addition, video R
The frame memory provided in the AM 30 corresponds to an image generation area in the present invention.

The liquid crystal monitor 4 has a screen 4 a for displaying a visual field image output from the VDP 27, and is mounted such that the screen 4 a is exposed on the game board 7. The liquid crystal monitor 4 corresponds to a display unit in the present invention.

The processing performed by the image display device 2 based on the command sent from the control board 1 will be described in detail with reference to flowcharts shown in FIGS. 5 to 7 are flowcharts mainly showing processing in the CPU 22, and FIG. 8 is a flowchart mainly showing processing in the VDP 27. In the present embodiment, a case will be described in which, for example, a display mode as shown in FIG. 9 is realized based on a command sent from the control board 1.
As shown in FIG. 9A, this display mode is such that a left identification symbol A1 is displayed on the left portion of the screen 4a of the liquid crystal monitor 4 on the screen 4a.
The middle identification symbol A2 is displayed on the background Ba on the right side of the screen 4a, and the middle identification symbol A2 is displayed on the background Ba, and the background Ba along with each of these identification symbols A1 to A3.
As shown in FIG. 9B, the image is displayed as if it were moved rightward on the screen 4a.

First, the processing on the CPU 22 side will be described with reference to FIG. Step T1 (Initialization of CPU, RAM, etc.) When the power of the gaming machine is turned on, the image display device 2 is initialized. Specifically, the CPU 22 executes the program RO
By executing the control program stored in the M24, initialization such as bus width and interrupt processing, and initialization for writing “0” data to the work RAM 25 are performed.

Step T2 (select a display program according to the received command) The interface 21 sequentially receives the commands sent from the control board 1, and sequentially passes the commands to the CPU 22. The CPU 22 stores the received command in a command buffer provided in the work RAM 25, for example. Further, the CPU 22 grasps the type of the command stored in the command buffer, selects a display program corresponding to the command from the program ROM 24,
Execute the display program. By executing the display program, the CPU 22 executes the following steps to realize a display mode as shown in FIG.

Step T3 (Setting of Object) The CPU 22 determines the object OA1 corresponding to the left identification symbol A1 and the object OA corresponding to the middle identification symbol A2.
2 and various kinds of data for setting the object OA3 corresponding to the right identification symbol A3 in the world coordinate system are written in the work RAM 25. Hereinafter, step T
The processing performed in step 3 will be described with reference to the flowchart shown in FIG.

Step T31 (Place Object) As shown in FIG. 10A, the CPU 22 sets an object OA1 corresponding to the left identification symbol A1 and a middle identification symbol A2.
In order to arrange the object OA2 corresponding to the object identification number OA2 and the object OA3 corresponding to the right identification symbol A3 at the respective arrangement positions in the world coordinate system, arrangement coordinate data of the arrangement positions is derived. This arrangement coordinate data is derived by referring to, for example, a table prepared in advance in the display program. The arrangement coordinate data is data in a coordinate (X, Y, Z) format in the world coordinate system. Further, the CPU 22 derives rotation angle data for determining the orientation of each object in the same manner as the arrangement coordinate data. The rotation angle data is rotation angle data for rotating each object in the local coordinate system around each of the x, y, and z axes. For example, the rotation angle data indicates that the object OA1 is 45 ° around the y axis,
If the data is to rotate 45 ° around the x-axis and 30 ° around the z-axis, the object OA1 in the local coordinate system, which is the reference posture, is rotated 45 ° around its y-axis. Rotated 45 degrees around its x axis,
It is rotated 30 ° about its z-axis. As a result, in the local coordinate system, 45 ° around the y axis and 45 ° around the x axis.
Object OA tilted at 30 ° around ° and z axes
1 is arranged at the coordinates in the world coordinate system specified by the above-described arrangement coordinate data. Step T31 includes:
It is executed only when a new command is received, and when Step T3 is repeatedly executed without receiving a new command, Steps T32 to T
35 is repeatedly executed.

Step T32 (Update the Arrangement Position of Objects) The CPU 22 updates the arrangement position of each object in the world coordinate system. Specifically, the CPU 22 derives arrangement coordinate data of a new arrangement position of each of the objects OA1 to OA3 by referring to, for example, a table prepared in advance in the display program, or by performing an arithmetic operation on an arithmetic expression. When an arithmetic expression is used, a predetermined value is added to or subtracted from the arrangement coordinate data of the current arrangement position, and the arrangement coordinate data of a new arrangement position is sequentially calculated. Thus, by sequentially updating the arrangement coordinate data of the arrangement position, each object OA1 to OA3 can be moved in the world coordinate system. In the present embodiment, for the sake of convenience of description, the arrangement coordinate data of each of the objects OA1 to OA3 is maintained at the same value, and the objects OA1 to OA3 are stopped in the world coordinate system.

Step T33 (Update the Rotation Angle of the Object) The CPU 22 updates the rotation angle of each object in the local coordinate system. Specifically, the CPU 22 derives the rotation angle data of each of the objects OA1 to OA3 by referring to, for example, a table prepared in advance in the display program or by performing an arithmetic operation on an arithmetic expression. When an arithmetic expression is used, the rotation angle data is sequentially calculated by adding or subtracting a predetermined value to or from a rotation angle around each axis included in the current rotation angle data. In this way, by sequentially updating the rotation angle data and sequentially arranging the objects OA1 to OA3 having postures corresponding to the rotation angle data, the objects OA1 to OA3 can be freely rotated. In this embodiment, for convenience of explanation, the rotation angle data of each of the objects OA1 to OA3 is maintained at the same value,
1 to OA3 are stopped in the world coordinate system.

Step T34 (Generate Posture Rotation Data) Based on the rotation angle data derived in Step T34, the CPU 22 generates a VD for rotating the object.
Generate posture rotation data to be given to P27. Since the rotation angle data is merely angle data indicating a rotation angle for each axis of the local coordinate system, three-dimensional coordinate data cannot be rotated by itself. Therefore, based on the rotation angle data, posture rotation data in a matrix format that enables rotation of the three-dimensional coordinate data is generated.

Here, the rotation angle data is a rotation angle for rotating the object by θ _y ° around the y axis, θ _x ° around the x axis, and θ _z ° around the z axis. A rotation matrix is obtained for each rotation angle of. Therefore, matrix (1) shows a y-axis rotation matrix showing rotation about the y-axis, matrix (2) shows an x-axis rotation matrix showing rotation about the x-axis, and matrix (3) shows rotation about the z-axis. Each shows a z-axis rotation matrix.

[0054]

(Equation 1)

[0055]

(Equation 2)

[0056]

(Equation 3)

The total rotation matrix is obtained by multiplying each of the rotation matrices (1) to (3). Matrix (4)
Shown in

[0058]

(Equation 4)

The CPU 22 substitutes the rotation angles (θ _x , θ _y , θ _z ) around the respective axes contained in the rotation angle data into the respective angle elements (Cos θ _x, etc.) of all the rotation rows, thereby obtaining 3 × 3 is generated.

Step T35 (Write Data to Work RAM) The CPU 22 pastes the storage address in the character ROM 29 where the model data of each object to be arranged in the world coordinate system is stored, and the polygon included in each model data. The storage address in the character ROM 29 where the texture data is stored, the arrangement coordinate data of the arrangement position of each object in the world coordinate system, and the posture rotation data are written in the work RAM 25.

Step T4 (Setting a Background) The CPU 22 sets a viewpoint in the world coordinate system and a line of sight based on the viewpoint, and rotates the line of sight around the viewpoint. The work RAM 2 stores data for displaying the background Ba displayed on the screen 4a so as to move based on the rotation angle of the line of sight at this time.
Write in 5. Hereinafter, the processing performed in step T4 will be described with reference to the flowchart shown in FIG.

Step T41 (Setting of Viewpoint and Viewing Direction) As shown in FIG. 10A, the CPU 22 sets a viewpoint SP in the world coordinate system, and moves from the viewpoint SP to each of the objects OA1 to OA3. A line-of-sight coordinate system that sets the z-axis as the line-of-sight direction is set. Specifically, the CPU 22
Derives viewpoint coordinate data which is coordinates for setting the viewpoint SP in the world coordinate system by executing a display program. The viewpoint coordinate data is data in a coordinate (X, Y, Z) format in the world coordinate system.
Further, the CPU 22 sets a line-of-sight coordinate system in which the line of sight is the z-axis centered on the viewpoint SP, and derives rotation angle data for directing the line-of-sight direction to each of the objects OA1 to OA3. The rotation angle data of the line-of-sight direction is rotation angle data for rotating the line-of-sight direction, which is the z-axis in the line-of-sight coordinate system, around each of the x, y, and z axes of the line-of-sight coordinate system.

Step T42 (Setting Display Area on Background Image) The CPU 22 sets a display area corresponding to the screen 4a on the background image stored in the character ROM 29. Specifically, as shown in FIG.
U22 derives the coordinates (Δx, Δy) of the two-dimensional display reference point P1 on the background image B, which is two-dimensional background image data, by executing the display program.
A rectangular display area BF including 1 as a vertex is set.
(Δx, Δy) is initial coordinate data of the display reference point P1 when the origin is the upper left corner of the background image B. In addition,
Steps T41 and T42 are executed when a new command is received. When step T4 is repeatedly executed without receiving a new command, steps T43 to T47 described later are repeatedly executed. .

Step T43 (Update the rotation angle in the line of sight) The CPU 22 updates the rotation angle in the line of sight. Specifically, the CPU 22 derives the rotation angle data in the line-of-sight direction by referring to, for example, a table prepared in advance in the display program or performing arithmetic processing on an arithmetic expression.
When an arithmetic expression is used, the rotation angle data in the line-of-sight direction is sequentially calculated by adding or subtracting a predetermined value to or from the rotation angle around each axis included in the latest rotation angle data.

Step T44 (Generate Line-of-Sight Rotation Data) The CPU 22 generates line-of-sight rotation data to be given to the VDP 27 to rotate the line-of-sight coordinate system based on the rotation angle data of the line-of-sight direction derived in step T43. Note that the rotation angle data of the line-of-sight direction is simply data of an angle for each axis in the line-of-sight coordinate system, so that the line-of-sight coordinate system cannot be rotated by itself.
Therefore, line-of-sight rotation data in a matrix format for acting on a unit vector (0, 0, 1) on the z-axis, which is the line-of-sight direction in the line-of-sight coordinate system, is generated based on the rotation angle data in the line-of-sight direction. The line-of-sight rotation data is obtained from each angle element (Co) included in the total rotation matrix (4) obtained in step T34 described above.
the S.theta _x, etc.), the rotational angle (theta _x around each axis included in the rotation angle data of the sight line direction, theta _y, is generated by substituting the theta _z).

The line-of-sight direction can be freely rotated by multiplying the above-described full rotation matrix (4) by the unit vector of the z-axis in the line-of-sight coordinate system. For example, by multiplying the line-of-sight rotation data for rotating about the y-axis of the line-of-sight coordinate system by θ _y degrees with the unit vector of the z-axis in the line-of-sight coordinate system, as shown in FIG. It can be rotated about the y-axis by θ _y degrees. Further, with the rotation in the line-of-sight direction, the field of view range TM moves to the left.

Step T45 (Calculate the amount of movement of the display area based on the rotation angle) The CPU 22 calculates the amount of movement of the display area BF based on the rotation angles around each axis included in the rotation angle data in the line-of-sight direction. . In the present embodiment, the display reference point P
The case of calculating the coordinates after the movement of No. 1 will be described. For example, the line of sight (z axis) is rotated by θ _x degrees counterclockwise (or clockwise) with the _x axis as the rotation axis, and θ _y degrees counterclockwise (or clockwise) with the y axis as the rotation axis. In this case, the coordinates of the display reference point P1 after the movement are calculated by the following equations. Here, the background image B has a width of D dots,
The vertical width is composed of H dots. That is, (0,
The background image is developed in a two-dimensional coordinate system ranging from (0) to (D, H).

Bx = a × D × θ _y ÷ 360 + Δx (1) By = b × Sin _{θ x} + Δy (2) Bx: x coordinate on background image B after movement of display reference point P1 : Y coordinate on background image B after movement of display reference point P1 Δx, Δy: coordinates of display reference point P1 before movement a, b: arbitrary constant

The CPU 22 calculates the coordinates of the display reference point P1 after moving on the background image B by substituting the rotation angles θ _x and θ _y into the above equations (1) and (2).
When the values of the constants a and b are changed, the moving amount of the display area BK changes. Therefore, any constant a,
As b increases, the amount of movement of the background Ba on the screen 4a increases (moves faster), while arbitrary constants a and b
Is smaller, the movement of the background Ba is smaller (moves more slowly), so that a more realistic display mode can be realized by changing the values of the constants a and b.

Step T46 (moving the display area) The CPU 22 sets again the rectangular display area BF including the moved display reference point P1 as a vertex. This causes the display area BF to move on the background image B as shown in FIG.

Step T47 (write data to work RAM) The CPU 22 stores the viewpoint coordinate data and the line-of-sight rotation data of the viewpoint SP, and the storage address in the character ROM 29 corresponding to the coordinates of the display reference position P1 on the background image B. Write to the work RAM 25. Therefore, the background Ba pattern displayed on the screen 4a of the liquid crystal monitor 4 is displayed so as to move in a direction opposite to the moving direction of the display area BF.

Step T5 (Interruption Occurred?) The CPU 22 waits for an interrupt performed, for example, every vertical scanning signal (for example, 1/60 second) of the liquid crystal monitor 4, and when an interrupt occurs, the CPU 22 proceeds to Step T6. In step T5, the process shifts to step T6 by interruption every vertical scanning signal (for example, 1/60 second). However, when a three-dimensional image is handled by a relatively low-speed CPU, for example, vertical scanning is performed. It is preferable that the process shifts to step T6 every time a signal is generated twice (for example, every 1/30 second).

Step T6 (DMA Transfer of Data) The CPU 22 instructs the DMA 26 to transfer the data stored in the work RAM 25. The DMA 26 collectively transmits the data in the work RAM 25 to the VDP 27 according to the instruction. Specifically, the data transferred from the work RAM 25 includes a storage address in the character ROM 29 where model data of each object to be arranged in the above-described world coordinate system is stored, and a paste to each polygon included in each model data. Addresses stored in the character ROM 29 in which texture data is stored, arrangement coordinate data and orientation rotation data of the arrangement position of each object in the world coordinate system, viewpoint coordinate data and viewpoint rotation data of the viewpoint SP, and Character ROM2 corresponding to the coordinates of the display reference position P1 in
9 is included.

Step T7 (Reception of New Command?) The CPU 22 grasps the command buffer in the work RAM 25, and if a new command has been received, proceeds to step T2 while receiving a new command. If not, the process proceeds to step T3.

Next, processing on the VDP 27 side will be described with reference to FIG. Step U1 (Receive Data?) The VDP 27 waits for reception of data in the work RAM 25, and upon receiving data, shifts to step U2.

Step U2 (Reading of Background Image Data in Display Area) The VDP 27 calculates the background image data based on the data of the storage address in the character ROM 29 corresponding to the coordinates of the display reference point P1.
Only the background image data included in the display area BF on the background image B is read from the character ROM 29.

Step U3 (Draw Background in Frame Memory) The VDP 27 draws a background image in the first frame memory 30a or the second frame memory 30b of the video RAM 30 based on the background image data read from the character ROM 29. . Therefore, the pattern of the background image B stored in the character ROM 29 is drawn in substantially the same size without being reduced as compared with the case where the texture of the background image is pasted on the object arranged in the world coordinate system.

Step U4 (Read Model Data?) The VDP 27 reads the model data of the object arranged in the world coordinate system based on the received storage address of the model data in the character RAM 29.

Step U5 (rotating each polygon,
The VDP 27 calculates the coordinate data of each vertex after rotation by multiplying the coordinate data of the vertex of each polygon included in the model data by the received attitude rotation data. Specifically, the coordinates (X ′, Y ′, Z ′) after rotation are the coordinates (X ′, Y ′, Z ′) before rotation × (the above-described posture rotation data in the 3 × 3 rotation matrix format). ), And the calculation using this equation is performed on the vertices of all the polygons included in the model data. Thereby, model data in a state where the object is rotated is obtained. The VDP 27 arranges the object on the world coordinate system based on the arrangement coordinate data of the arrangement position of the object and the rotated model data. That is, the coordinate data in the local coordinate system of each polygon included in the model data of the object is converted into the coordinate data in the world coordinate system. In this embodiment, since each object is rotated, the coordinate data of the object in the local coordinate system is simply converted to the coordinate data in the world coordinate system without rotating each object.

Step U6 (Projection to Screen Coordinate System) The VDP 27 converts each object in the world coordinate system into a line-of-sight coordinate system based on the viewpoint SP, as shown in FIG. Here, the coordinate data of each polygon included in the model data of each object in the world coordinate system is converted into the coordinate data of the line-of-sight coordinate system. Further, each object in the line-of-sight coordinate system is perspectively projected on a projection plane SC which is a screen coordinate system set perpendicular to the line-of-sight direction (z-axis) of the line-of-sight coordinate system. The projection plane SC is a coordinate system for displaying on the screen 4a, and each object included in the view range TM is projected. Here, the coordinate data of each polygon of each object in the line of sight
It is converted into two-dimensional coordinate data of a screen coordinate system.

Step U7 (Reading of Texture Data) The VDP 27 reads the texture data to be attached to the polygon included in the model data of each object based on the received storage address in the character RAM 29.

Step U8 (Paste of Texture Data) The VDP 27 deforms the texture data in accordance with the shape of the polygon of the object projected on the projection plane SC, and then pastes the texture data to the polygon. That is, the VDP 27 draws the texture in the frame memory in which the background image corresponding to the projection plane SC is drawn. As a result, the first frame memory 3
A field-of-view image in which each object is drawn on a background image is generated in 0a or the second frame memory 30b.

Step U9 (Interruption Occurred?) The VDP 27 waits for an interrupt performed, for example, every vertical scanning signal (for example, 1/60 second) of the liquid crystal monitor 4, and when the interrupt occurs, stores it in the frame memory of the video RAM 30. The obtained visual field image is output to the liquid crystal monitor 4.

Step U10 (Display) The liquid crystal monitor 4 sequentially displays the visual field images output from the VDP 27, and as shown in FIG. 9, the background Ba together with the identification pattern which is the image of the object is displayed on the screen 4a.
It shows how to move to the left inside.

According to the image display device 2 of the gaming machine described above, the background based on the background image stored in the character ROM 29 is displayed on the screen 4a without using the object arranged in the virtual three-dimensional space (world coordinate system). , The background pattern can be displayed in the same size, and the so-called geometry calculation processing can be reduced. As a result, the background can be displayed according to the image of the person who programmed the display program, and the processing speed of the entire image display device 2 can be increased. Also, based on the rotation angle of the line of sight, the screen 4
Since the background in a is moved, more realistic display can be realized. Further, the amount of movement of the background on the screen 4a can be changed, so that a realistic display mode can be realized. As a result, the player playing the gaming machine equipped with the image display device can see a more realistic display mode, and can keep the player's interest perpetual.

In the above embodiment, the character ROM
The background image B stored in the memory 29 is a cylindrical image in which the patterns on the left and right sides are drawn continuously. For example, in the background image B, the patterns on the upper and lower sides and left and right sides are continuous. It may be a spherical image drawn as described above. In that case, the coordinates after the movement of the display reference point P1 of the display area BF are obtained by the following arithmetic expressions.

Bx = a × D × θ _y ６０360 + Δx (1) By = b × H × θ _x ÷ 360 + Δy (3)

The coordinates after movement of the movement reference point P1 of the display area BF on the spherical background image B can be calculated by the equations (1) and (3).
With this configuration, it is possible to display a seamless background vertically, horizontally, and horizontally on the screen 4a.

Although the pachinko machine has been described as a gaming machine, the present invention is not limited to this. For example, the present invention is applied to various gaming machines such as arcade game machines, home video game machines, and medal game machines. can do. In this case, a command from the control board 1 may be replaced with, for example, an input signal from the controller, and a display program for performing display according to the input signal may be executed.

[0090]

As is apparent from the above description, according to the present invention, a background can be displayed without using an object set in a virtual three-dimensional space.
Compared to the case where the background is displayed by the objects arranged in the virtual three-dimensional space, the background image can be displayed more realistically, and the processing in the image display device can be sped up.

[Brief description of the drawings]

FIG. 1 is an external view showing a schematic configuration of a pachinko machine according to an embodiment.

FIG. 2 is a block diagram of the pachinko machine according to the embodiment.

FIG. 3 is a flowchart showing processing of a control board of the pachinko machine.

FIG. 4 is a functional block diagram of a VDP in the image display device.

FIG. 5 is a flowchart illustrating a process performed by a CPU of the image display device.

FIG. 6 is a flowchart showing a process in step T3.

FIG. 7 is a flowchart showing a process in step T4.

FIG. 8 is a flowchart illustrating a process performed by the VDP of the image display device.

FIG. 9 is a diagram illustrating a state of a screen displayed on the image display device.

FIG. 10 is a diagram illustrating a state where an object is arranged in a world coordinate system.

FIG. 11 is a diagram showing a state where a display area is set on a background image.

FIG. 12 is a diagram showing a background image of a conventional example.

FIG. 13 is a diagram illustrating a state in which objects are arranged in a world coordinate system in a conventional example.

FIG. 14 is a diagram showing a state of a screen of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Control board 2 ... Image display device 4 ... Liquid crystal monitor 4a ... Screen 22 ... CPU 24 ... Program ROM 25 ... Work RAM 26 ... DMA 27 ... VDP 29 ... Character ROM 30 ... Video RAM

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Gota Makino 655 Fukudome-cho, Matsuto City, Ishikawa Pref. AA36 EB55 5B050 AA10 BA09 EA12 EA19 EA27 EA28 EA30 FA02

Claims (1)

[Claims] 1. A storage unit for storing at least an object formed by a plurality of polygons and a texture in which a pattern to be pasted on each polygon of the object is drawn, and a virtual three-dimensional object stored in the storage unit. Object setting means for setting in a space, gaze rotation means for rotating a gaze direction based on a given viewpoint in the virtual three-dimensional space around the viewpoint, and two-dimensional with respect to the rotated gaze direction Projecting means for projecting the object on the projection plane, and a field-of-view image obtained by pasting the texture stored in the storage means on each polygon of the object projected on the projection plane. A visual field image generating means for generating a visual field image in the image generating area corresponding to A display output unit configured to display a state in the virtual three-dimensional space with the rotation of the line of sight, wherein the storage unit further includes a background displayed on the back side of the object in the view image. An image display device that stores an image, and further includes a background image setting unit that sets a background image stored in the storage unit in the image generation area before generating the visual field image.